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A set of dedicated sky observations is executed regularly on CIRES and VISIR, in order to measure the current PWV content of the atmosphere. For CRIRES, this is OB #200179115 ("PWV_5050p4"). For VISIR, this is OB #200154321 ("SkySpectrum_MR_BurstMode"). The output data are analyzed on the fly by a routine which fits the telluric lines to a model. The results are written into the nightlog and into the following table. The fitting routine, and its integration into operations, has been implemented by Alain Smette.
Find here the current FIT results from CRIRES and VISIR telluric spectra:
2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
2012 | 2013